US4887482A - Cable-guide element for the rear derailer of a bicycle - Google Patents

Cable-guide element for the rear derailer of a bicycle Download PDF

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Publication number
US4887482A
US4887482A US07/363,813 US36381389A US4887482A US 4887482 A US4887482 A US 4887482A US 36381389 A US36381389 A US 36381389A US 4887482 A US4887482 A US 4887482A
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US
United States
Prior art keywords
cable
hemispherical
bicycle
derailer
support element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/363,813
Inventor
Antonio Romano
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Campagnolo SRL
Original Assignee
Campagnolo SRL
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Publication date
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Assigned to CAMPAGNOLO S.R.L. reassignment CAMPAGNOLO S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROMANO, ANTONIO
Application granted granted Critical
Publication of US4887482A publication Critical patent/US4887482A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/12—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/127—Mounting or guiding of cables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/26—Construction of guiding-sheathings or guiding-tubes
    • F16C1/262—End fittings; Attachment thereof to the sheathing or tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F16C2326/28—Bicycle propulsion, e.g. crankshaft and its support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
    • Y10T74/2042—Flexible transmitter [e.g., Bowden cable] and hand operator
    • Y10T74/20438—Single rotatable lever [e.g., for bicycle brake or derailleur]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
    • Y10T74/2045—Flexible transmitter [e.g., Bowden cable] and sheath support, connector, or anchor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
    • Y10T74/20462—Specific cable connector or guide

Definitions

  • the present invention relates to a rear derailer for a bicycle, of the type comprising:
  • a second body which carries two wheels for guiding the bicycle chain and is connected to the first body by means which enable the second body to be displaced relative to the first body
  • a metal operating cable having one end fixed to the means for displacing the second body relative to the first body
  • a guide sheath for the cable provided at one end with a support element having a hemispherical end portion which is supported for rotation by a correspondingly-shaped seat formed in the first body.
  • FIGS. 1 and 2 of the appended drawings show prior-art rear derailers for bicycles.
  • the guide sheath of the cable bears against the first body at one end and its inclination relative to the upper surface of the first body cannot be varied as a result of successive operations of the derailer.
  • the metal operating cable is therefore continually bent at the point P as a result of each successive operation of the derailer.
  • derailers such as that illustrated in FIG. 2 have already been proposed.
  • the end of the sheath is fixed to a metal support element having a hemispherical end portion supported for rotation by a correspondingly-shaped seat formed in the upper surface of the first body.
  • the object of the rotary connection is to enable the sheath to follow the changes in the inclination of the cable when the latter is operated.
  • the above element is ineffective, since the stiffness of the sheath prevents its movement, so the cable is still bent at the point P as a result of its operation.
  • the object of the present invention is to provide a derailer of the type specified at the beginning of the present description which does not have the above disadvantage.
  • this object is achieved by virtue of the fact that the support element is provided with a tubular extension for guiding the cable, the extension projecting from the hemispherical portion, passing through the first body, and extending almost to the fixing end of the cable.
  • FIGS. 1 and 2 show a prior-art derailer
  • FIG. 3 shows a cable-guide element according to the invention, on an enlarged scale
  • FIGS. 4 and 5 show a derailer provided with the device according to the invention in two different operative positions.
  • FIGS. 4 and 5 A rear derailer for a bicycle is shown in its entirety in FIGS. 4 and 5.
  • the derailer 1 includes, in known manner, a first body 2 connected to the bicycle frame (not shown) and a second body 3 which carries the chain-guide wheels 4.
  • the second body 3 is articulated to the first body 2 by means of a parallelogram joint formed by two connecting rods 5 and 6.
  • the connecting rods 5 and 6 have their ends articulated to the first body 2 and to the second body 3 respectively by means of longitudinal pins 7.
  • a metal operating cable 8 has one end 9 fixed to an appendage 10 of the connecting rod 6.
  • the opposite end of the cable 8 is operated by a conventional control lever (not shown) mounted on the bicycle frame.
  • the cable 8 is slidable in a guide sheath 11 provided with a guide element 12 at one end.
  • the guide element 12 has an internal bore for the passage of the cable 8 and includes an upper body 13 which is provided with a tubular extension 14 at its lower end.
  • the upper body 13 of the element 12 bears against the upper part of a projection 15 of the first body 2.
  • the projection 15 of the first body 2 has a hole 16 in which the tubular extension 14 of the element 12 is arranged.
  • the body 13 of the element 12 is provided at its bottom with a hemispherical portion 17 which bears against a correspondingly-shaped seat 18 formed in the upper surface of the projection 15, in correspondence with the hole 16.
  • the operation of the derailer control lever causes a displacement of the second body 3 relative to the first body 2, and the guide wheels 4 cause the movement of the chain from one sprocket of a set of sprockets carried by the hub of the rear wheel of the bicycle to another.
  • the inclination of the cable 8 changes as a result of this movement, as can be seen from a comparison of FIGS. 4 and 5.
  • the metal cable 8 compels the tubular extension 14 to take up the same inclination.
  • the guide element 12 therefore rotates in the seat 18 and imposes a variation in the inclination on the sheath 11.
  • the section of the cable 8 between the first body 2 and its fixing end 9 therefore remains perfectly straight and the bending and weakening of the cable are avoided.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Flexible Shafts (AREA)

Abstract

A rear derailer for bicycles comprises a first body for fixing to the bicycle frame, a second body which carriers two chain-guide wheels and is connected to the first body by means which enable the second body to be displaced relative to the first body, a metal operating cable having one end fixed to the means for displacing the second body relative to the first body, and a cable-guide sheath provided at one end with a support element having a hemispherical end portion which is supported for rotation by a correspondingly-shaped seat formed in the first body. The support element is provided with a tubular extension for guiding the cable, the extension projecting from the hemispherical portion, passing through the first body, and extending almost to the fixed end of the cable.

Description

The present invention relates to a rear derailer for a bicycle, of the type comprising:
a first body for fixing to the bicycle frame,
a second body which carries two wheels for guiding the bicycle chain and is connected to the first body by means which enable the second body to be displaced relative to the first body,
a metal operating cable having one end fixed to the means for displacing the second body relative to the first body, and
a guide sheath for the cable, provided at one end with a support element having a hemispherical end portion which is supported for rotation by a correspondingly-shaped seat formed in the first body.
FIGS. 1 and 2 of the appended drawings show prior-art rear derailers for bicycles.
According to the earlier prior art shown in FIG. 1, the guide sheath of the cable bears against the first body at one end and its inclination relative to the upper surface of the first body cannot be varied as a result of successive operations of the derailer. The metal operating cable is therefore continually bent at the point P as a result of each successive operation of the derailer.
In an attempt to avoid this problem, derailers such as that illustrated in FIG. 2 have already been proposed. In this type of derailer, the end of the sheath is fixed to a metal support element having a hemispherical end portion supported for rotation by a correspondingly-shaped seat formed in the upper surface of the first body. The object of the rotary connection is to enable the sheath to follow the changes in the inclination of the cable when the latter is operated. However, in use, the above element is ineffective, since the stiffness of the sheath prevents its movement, so the cable is still bent at the point P as a result of its operation.
The object of the present invention is to provide a derailer of the type specified at the beginning of the present description which does not have the above disadvantage.
According to the present invention, this object is achieved by virtue of the fact that the support element is provided with a tubular extension for guiding the cable, the extension projecting from the hemispherical portion, passing through the first body, and extending almost to the fixing end of the cable.
By virtue of this characteristic, the bending of the cable as a result of its operation and the consequent weakening of the cable itself are avoided.
Further characteristics and advantages of the present invention will become clear from the detailed description which follows with reference to the appended drawings, provided by way of non-limiting example, in which:
FIGS. 1 and 2 show a prior-art derailer,
FIG. 3 shows a cable-guide element according to the invention, on an enlarged scale,
FIGS. 4 and 5 show a derailer provided with the device according to the invention in two different operative positions.
A rear derailer for a bicycle is shown in its entirety in FIGS. 4 and 5. The derailer 1 includes, in known manner, a first body 2 connected to the bicycle frame (not shown) and a second body 3 which carries the chain-guide wheels 4. The second body 3 is articulated to the first body 2 by means of a parallelogram joint formed by two connecting rods 5 and 6. The connecting rods 5 and 6 have their ends articulated to the first body 2 and to the second body 3 respectively by means of longitudinal pins 7.
A metal operating cable 8 has one end 9 fixed to an appendage 10 of the connecting rod 6. The opposite end of the cable 8 is operated by a conventional control lever (not shown) mounted on the bicycle frame. The cable 8 is slidable in a guide sheath 11 provided with a guide element 12 at one end.
As shown in FIG. 3, the guide element 12 has an internal bore for the passage of the cable 8 and includes an upper body 13 which is provided with a tubular extension 14 at its lower end. The upper body 13 of the element 12 bears against the upper part of a projection 15 of the first body 2. The projection 15 of the first body 2 has a hole 16 in which the tubular extension 14 of the element 12 is arranged. The body 13 of the element 12 is provided at its bottom with a hemispherical portion 17 which bears against a correspondingly-shaped seat 18 formed in the upper surface of the projection 15, in correspondence with the hole 16.
The operation of the derailer control lever causes a displacement of the second body 3 relative to the first body 2, and the guide wheels 4 cause the movement of the chain from one sprocket of a set of sprockets carried by the hub of the rear wheel of the bicycle to another. The inclination of the cable 8 changes as a result of this movement, as can be seen from a comparison of FIGS. 4 and 5. During the change of inclination, the metal cable 8 compels the tubular extension 14 to take up the same inclination. The guide element 12 therefore rotates in the seat 18 and imposes a variation in the inclination on the sheath 11. The section of the cable 8 between the first body 2 and its fixing end 9 therefore remains perfectly straight and the bending and weakening of the cable are avoided.
Naturally, the principle of the invention remaining the same, the forms of embodiment and details of construction may be varied widely with respect to those described and illustrated without thereby departing from the scope of the present invention.

Claims (1)

What is claimed is:
1. A rear derailer for bicycles comprising:
a first body for fixing to a bicycle frame,
a second body which carries two wheels for guiding a bicycle chain;
means which connect the second body to the first body and enable the second body to be displaced relative to the first body,
a metal operating cable having one end fixed to the means for displacing the second body relative to the first body, and
a cable-guide sheath provided at one end with a support element having a hemispherical end portion, the first body defining a seat which has a shape corresponding to that of the end portion and in which the hemispherical end portion is supported for rotation, wherein the support element is provided with a tubular extension for guiding the cable, the extension projecting from the hemispherical portion, passing through the first body, and extending almost to the fixed end of the cable.
US07/363,813 1988-06-15 1989-06-09 Cable-guide element for the rear derailer of a bicycle Expired - Fee Related US4887482A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT53337/88[U] 1988-06-15
IT8853337U IT214880Z2 (en) 1988-08-01 1988-08-01 CABLE GUIDE ELEMENT FOR THE REAR DERAILLEUR OF A BICYCLE

Publications (1)

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US4887482A true US4887482A (en) 1989-12-19

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US (1) US4887482A (en)
JP (1) JPH0241995A (en)
FR (1) FR2634851A1 (en)
IT (1) IT214880Z2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391014A (en) * 1993-09-14 1995-02-21 Kalloy Industrial Co., Ltd. Universally rotatable nipple for a brake cable
US5799544A (en) * 1994-11-18 1998-09-01 Shimano Inc. Apparatus for sealing a bicycle control cable
US5809840A (en) * 1995-02-14 1998-09-22 Shimano, Inc. Protective cap system for bicycle cable
US5875687A (en) * 1996-04-10 1999-03-02 Shimano, Inc. Protective cap system for bicycle cable
US5957792A (en) * 1996-01-16 1999-09-28 Shimano, Inc. Cable support for a derailleur
WO2001057418A1 (en) * 2000-02-02 2001-08-09 Brigham Young University A compliant derailleur
US6757975B1 (en) 2001-01-25 2004-07-06 Brigham Young University Multi-layered compliant mechanisms and method of manufacture
US9163707B2 (en) 2011-09-30 2015-10-20 Mtd Products Inc Method for controlling the speed of a self-propelled walk-behind lawn mower
US10894576B2 (en) * 2017-11-10 2021-01-19 Ad-Ii Engineering Inc. Bicycle rear derailleur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2546463Y2 (en) * 1991-06-12 1997-09-03 株式会社シマノ Structure for fixing operation wires for bicycles

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GB601743A (en) * 1945-10-10 1948-05-12 Leslie Richard Bane Improvements in chain shifting devices for cycles and the like
FR934395A (en) * 1945-10-10 1948-05-20 Constrictor Tyre Company Ltd Improvements to derailleurs for bicycles and other similar vehicles
FR64341E (en) * 1953-06-09 1955-11-09 Chain derailleur for multi-speed cycles
US2773398A (en) * 1953-04-27 1956-12-11 Norman R Swain Transmission control and guard
US3535950A (en) * 1967-11-13 1970-10-27 Shimano Industrial Co Exposed speed change mechanism for a bicycle
US3957138A (en) * 1973-10-04 1976-05-18 Shimano Industrial Company, Limited Automatic adjusting device for a bicycle
US4193309A (en) * 1975-08-01 1980-03-18 Shimano Industrial Company Limited Speed-changing device for bicycle
US4198873A (en) * 1977-07-01 1980-04-22 Shimano Industrial Company Limited Speed changing device for a bicycle and the like
SU850485A1 (en) * 1979-09-03 1981-07-30 Пермский Машиностроительный Заводим.Октябрьской Революции Bicycle gear-shifting device
US4507101A (en) * 1982-04-07 1985-03-26 Shimano Industrial Company Limited Speed control device for a bicycle
US4599913A (en) * 1984-02-15 1986-07-15 Wayne Dawson Adjustable releasable cable coupling device
US4618332A (en) * 1984-05-21 1986-10-21 Shimano Industrial Company Limited Derailleur for a bicycle
US4637809A (en) * 1984-11-30 1987-01-20 Shimano Industrial Company Limited Rear derailleur for a bicycle
US4789379A (en) * 1987-10-06 1988-12-06 Maeda Industries, Ltd. Bicycle deraileur
US4801287A (en) * 1987-06-16 1989-01-31 Campagnolo S.P.A. Rear derailer for bicycle gears

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JPS5899968A (en) * 1981-12-09 1983-06-14 テルモ株式会社 Blood storage tank
JPS6159952A (en) * 1984-08-30 1986-03-27 Matsushita Electric Ind Co Ltd Automatic answering telephone set

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601743A (en) * 1945-10-10 1948-05-12 Leslie Richard Bane Improvements in chain shifting devices for cycles and the like
FR934395A (en) * 1945-10-10 1948-05-20 Constrictor Tyre Company Ltd Improvements to derailleurs for bicycles and other similar vehicles
US2773398A (en) * 1953-04-27 1956-12-11 Norman R Swain Transmission control and guard
FR64341E (en) * 1953-06-09 1955-11-09 Chain derailleur for multi-speed cycles
US3535950A (en) * 1967-11-13 1970-10-27 Shimano Industrial Co Exposed speed change mechanism for a bicycle
US3957138A (en) * 1973-10-04 1976-05-18 Shimano Industrial Company, Limited Automatic adjusting device for a bicycle
US4193309A (en) * 1975-08-01 1980-03-18 Shimano Industrial Company Limited Speed-changing device for bicycle
US4198873A (en) * 1977-07-01 1980-04-22 Shimano Industrial Company Limited Speed changing device for a bicycle and the like
SU850485A1 (en) * 1979-09-03 1981-07-30 Пермский Машиностроительный Заводим.Октябрьской Революции Bicycle gear-shifting device
US4507101A (en) * 1982-04-07 1985-03-26 Shimano Industrial Company Limited Speed control device for a bicycle
US4599913A (en) * 1984-02-15 1986-07-15 Wayne Dawson Adjustable releasable cable coupling device
US4618332A (en) * 1984-05-21 1986-10-21 Shimano Industrial Company Limited Derailleur for a bicycle
US4618332B1 (en) * 1984-05-21 1989-05-30
US4637809A (en) * 1984-11-30 1987-01-20 Shimano Industrial Company Limited Rear derailleur for a bicycle
US4801287A (en) * 1987-06-16 1989-01-31 Campagnolo S.P.A. Rear derailer for bicycle gears
US4789379A (en) * 1987-10-06 1988-12-06 Maeda Industries, Ltd. Bicycle deraileur

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391014A (en) * 1993-09-14 1995-02-21 Kalloy Industrial Co., Ltd. Universally rotatable nipple for a brake cable
US5799544A (en) * 1994-11-18 1998-09-01 Shimano Inc. Apparatus for sealing a bicycle control cable
US5809840A (en) * 1995-02-14 1998-09-22 Shimano, Inc. Protective cap system for bicycle cable
US6014910A (en) * 1995-02-14 2000-01-18 Shimano, Inc. Protective cap-system for bicycle cable
US5957792A (en) * 1996-01-16 1999-09-28 Shimano, Inc. Cable support for a derailleur
CN1077660C (en) * 1996-04-10 2002-01-09 株式会社岛野 Cable protective cover system for bicycle
US5875687A (en) * 1996-04-10 1999-03-02 Shimano, Inc. Protective cap system for bicycle cable
WO2001057418A1 (en) * 2000-02-02 2001-08-09 Brigham Young University A compliant derailleur
US6354971B1 (en) 2000-02-02 2002-03-12 Brigham Young University Compliant derailleur
US6757975B1 (en) 2001-01-25 2004-07-06 Brigham Young University Multi-layered compliant mechanisms and method of manufacture
US9163707B2 (en) 2011-09-30 2015-10-20 Mtd Products Inc Method for controlling the speed of a self-propelled walk-behind lawn mower
US9651138B2 (en) 2011-09-30 2017-05-16 Mtd Products Inc. Speed control assembly for a self-propelled walk-behind lawn mower
US9791037B2 (en) 2011-09-30 2017-10-17 Mtd Products Inc Speed control assembly for a self-propelled walk-behind lawn mower
US10894576B2 (en) * 2017-11-10 2021-01-19 Ad-Ii Engineering Inc. Bicycle rear derailleur

Also Published As

Publication number Publication date
IT8853337V0 (en) 1988-08-01
FR2634851A1 (en) 1990-02-02
JPH0241995A (en) 1990-02-13
IT214880Z2 (en) 1990-07-04

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